I have checked all of them, they are in perfect condition. I have tried to put the car on a ramp and seeing if the exhaust was touching any of the heat shields but there was no connection at all

 

I hope that he finds a solution for that...it seems that more people are joining the "shorty vibration club".

I think that we will find it eventually

 

bear in mind that while the RMW header has a flex joint component - it is more rigid than the other flex joints seen previously from other header manufacturers.

Pros - last a long time, should not fail.
possible Con - transfer a bit more vibration throughout the entire system.

Recently BBT (automatic) added a RMW header and Miltek and at idle, his tips wagged like a dogs tail. The system was checked more than once and everything was mated up just fine. Once on the gas it "normalized" and the car ran great. He solved his problem by actually dropping his idle 100 RPM or so.

If the rattles bothers you, you will have to do the famous rattle hunt and seek. Start with removing the rear heat shield and go from there.

 

Yeah, I'm confident that we'll figure SOMETHING out eventually... sounds like more folks have experienced this than I initially thought...

 

is there anyone around LA that has this problem so we can look at the exhaust?

 

Actually Danny found the source of my rattle (I think) yesterday and it had to do with the resonator on my Invidia.

 

I'm in LA, but no problems with my set-up.
Hey Jan check your PMs, thanks!

 

Just to be clear - Overall any vibration that is passed on by the RMW stiffer flex joint should be absorbed by rubber hangers of the exhaust. At most one might have to adjust the heatshields.

Btt's engine vibrated at idle like I've never seen before - perhaps autos do that or perhaps something is wrong w/ the engine dampners. As I said he calmed down by adjusting his idle.

 

will either of these bolt up to a alta 3"?

 

The shorty should mate to your alta!

 

he's going to need a bigger flange if the Alta has a 3" on their side

it can be easily made to suit

 

now thats what I like to hear!! Can't use the race though huh?

 

we can make a 3" collector for the race but you will need to modify the back section by shortening it to fit

 

would i need to modify for the street header or no?

 

not if we put a 3" on the flange

 

did this happen, or is it posted in another thread

 

I'll remove the rear heat shield tonight, although i doubt that it will fix anything

 

If you have what I have, it isn't a heat shield rattle...

 

I have the rattle also. I have been under my car more times in the last few weeks than I have been in three years. I am slowly pulling things away from each other to pin point the rattle. Sorry to say I have not found it yrt but I will keep you posted. Even with the rattles I still love the header.

 

I'm wondering if there's two issues going on or if peoples "rattle" is really a vibration.

For me, its a vibration not a rattle. It comes on at 2100 rpm then again more mildly at about 3400 rpm.

I had the invidia exhaust on my car. I had to take it off because it was so damn loud, it sounded like a 757 with a trumpet strapped to the engines. I have my stock exhaust on the car right now. The vibration is the same with the invidia and the stock.

I was under the car this morning trying to track down the cause. All hangers are good, all heat shields are out of the way, all header bolts are tight as well as all bolts on the exhaust. I'm going to get the car on a lift so I can better see if the flex joint has a preload on it. I couldn't tell well enough just laying on my back in the garage

 

Yeah.... I've only been able to diagnose mine rolling around on the creeper... and I'm too fat to fit as comfortably as I'd like...

So I'm interested in what you can find on the lift...

But our vibrations sound very, very similar...

I DO have an automatic... which would imply that the engine and header are shifted about 3/8" to the right vs. a manual... so that may be loading the flex joint a bit... but it sounds like some folks are having exactly the same behavior on their manuals...

 

Yeah, me too, except for me, I found a very loose heat shield. Once tightened, the floor vibration completely disappeared. I still have not been able to isolate my vibration/buzz above 6k. I was under the car today as well checking everything and it seems tight. Going to VIR on the 10th and I'd like to isolate the problem so I can run it to redline.

 

I think header = buzz. I'm OK with that.... it's the jackhammer sound that's an issue - you can hear mine on the 10th if it's not gone by then... but I thrashed the car in the mountains this weekend, and I LUUUUUVVVV it. Driving through stone gorges at WOT was just freakin outstanding.

 

You know, I've thought that as a possibility as well. Perhaps I'm expecting too much of the OEM feel, but Jan says there shouldn't be any vibration, which leads me to believe that it could still be a heat shield issue. I'm going to stop by Grassroots Garage either on the way or right after VIR.

I usually don't go above 6k rpm anyway, but I noticed the buzz because I've been exploring my new toys. Below 6k, it's as vibration free as stock!!

 

It's just hard for me to understand how you're not gonna get at least a LITTLE more NVH or rattles with all the extra energy that surging through the exhaust after the header upgrade... those I can live with... the jackhammering, not so much.

As for 6K RPM.... dancing in the mountains this weekend, my car saw redline A LOT.... <- Big Effin Grin